characteristics of refractoriesCTIP
Refractory materials play an integral role in many industrial heat processes from glass manufacturing to steel and aluminum production Equations for deformation by consolidation of pores and by slumping are developed The conditions prevailed in the different equipment in the cement kiln and other equipments associated with it are discussed at length This paper describes the underlying
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Magnesia Alumina Spinel BrickRongsheng Refractory
Magnesia alumina spinel brick is high temperature sintered basic refractory brick which adopts calcined magnesia high alumna bauxite clinker or corundum as main raw material Calcined magnesia sand used for making magnesia alumina spinel brick usually contains more than 90 of MgO its bulk density is between 3 20 3 25g/cm3
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characteristics of refractoriesCTIP
Refractory materials play an integral role in many industrial heat processes from glass manufacturing to steel and aluminum production Equations for deformation by consolidation of pores and by slumping are developed The conditions prevailed in the different equipment in the cement kiln and other equipments associated with it are discussed at length This paper describes the underlying
Get Price
Physical and chemical indicators and characteristics of
The wear resistant castables made from fused corundum super grade bauxite sillimanite alumina powder and silicon powder as raw materials are featured with convenient construction good wear resistance good spalling resistance and high strength at early and mid high temperature period which overcome the disadvantages of traditional castables
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Binders for Refractory Castables An Overview SpringerLink
Among the other sol bonding systems mainly alumina mullite magnesia and spinel sols are tested for refractory castables But there is not enough literature available on such studies The major hindrances for such applications are various processing difficulties such as a lower solid content of sol leading to poor bonding activity weak
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Evolution of an alumina magnesia/self forming spinel
MgO content in the castable seems to affect the hibonite development The development of a self forming spinel castable without any synthetic spinel grains appears to be promissory for optimum refractory linings Keywords Refractories magnesium aluminate spinel castable alumina magnesia refractory lining MgAl 2 O 4 MgO Al 2 O 3
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Spinel containing alumina based refractory castables
These spinels have either magnesia rich or stoichiometric composition In the late 1980 s spinel containing alumina refractories were also developed especially castables for steel ladle lining in Japan However magnesia rich spinels have shown disadvantages for such applications because they are designed to contain traces of free magnesia
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Effect of Spinel Content on the Reaction of Porous
Effects of Al Content on the Phase Constitution of Aluminum Periclase Composites at 1600°C in N 2 of Contents of Pre Synthesized Spinel on the Microstructures and Mechanical Properties of the Lightweight Corundum Spinel Refractory Castables Z Q Guo S Palco M Rigaud Reaction characteristics of magnesia–spinel refractories with
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refractory bricks made by using magnesia and pre synthesized spinel to that of refractory bricks made by use of alumina and magnesia which results in formation of in situ spinel The physical properties like apparent porosity and bulk density of both the types of bricks were compared with increasing spinel and alumina percent
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Working Conditions of Different Types of Refractory Castables
If it is a castable used in an alkaline atmosphere magnesia refractory castable should be used In the case of erosion and wear resistance use magnesia aluminum refractory castable or magnesia chromium castable If the temperature is too high magnesia castables with high specific gravity or high content magnesia castables can be used
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Characteristics of unshaped refractoriesChina
Generally speaking compared with sintered refractory products of the same material most unshaped refractories have a higher porosity before or even after sintering due to the smaller external force applied during molding some properties of structures or products before sintering are also May be changed due to chemical reaction if some
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Optimization of Properties for Alumina Spinel Refractory
Alumina magnesia and alumina spinel castables have been widely used in steel ladle linings below the slag zone the well block of purging plugs and injection lances due to their excellent slag resistance and mechanical properties 1 2 view of the increasing ratio of scrap to steel higher working temperature and prolonged refining time the enhanced properties of materials especially
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Alumina Magnesia Refractory CastablesRS Kiln Refractory
The characteristics of alumina magnesia spinel refractory castables are high temperature resistance strong structural spalling resistance resistance to chemical corrosion of steel slag resistance to rapid cold and rapid heat non sticking to molten steel and resistance to erosion
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Evolution of an alumina magnesia/self forming spinel
In order to deep the understanding of these castables this work presents the microstructural characteristics of an alumina magnesia/self forming spinel castable Several variables such as MgO content firing temperature and spinel formation are analyzed through XRD and SEM analysis
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Optimization of Properties for Alumina Spinel Refractory
1 Introduction Alumina magnesia and alumina spinel castables have been widely used in steel ladle linings below the slag zone the well block of purging plugs and injection lances due to their excellent slag resistance and mechanical properties 1 2 view of the increasing ratio of scrap to steel higher working temperature and prolonged refining time the enhanced properties of
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Porogenesis in the Alumina Brucite Magnesia Spinel System
Abstract Magnesium monoaluminate spinel MgAl 2 O 4 is an important raw material for the refractory industry and its in situ formation from Al 2 O 3 and MgO sources is
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PDF Microstructure and phase evolution of alumina–spinel
The microstructures of alumina–spinel refractory castables containing different amounts of nano alumina particles after 3 3 The influence of nano alumina content on the firing at 1300 8C are presented in Fig 6 microstructure It can be seen that addition of nano alumina particles can increase bonding system between fine particles which
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The refractory castable using with corundum aluminum magnesia spinel and fused magnesite as raw materials which is made of micro power technology and additive agent Read More Refractory castable is one of the unshaped refractory materials is made of refractory aggregate refractory powder binders and other additives
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Binders for Refractory Castables An Overview SpringerLink
Among the other sol bonding systems mainly alumina mullite magnesia and spinel sols are tested for refractory castables But there is not enough literature available on such studies The major hindrances for such applications are various processing difficulties such as a lower solid content of sol leading to poor bonding activity weak
Get PricePerformance Requirements of Al2O3 MgO Al2O3 Refractory
Ladle castables are made of bauxite clinker corundum magnesia magnesium spinel and ultrafine powder etc with different binders and additives Its characteristics are strong corrosion resistance good thermal shock resistance good volume stability suitable for medium and small ladle use and long life
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Figure 1 shows the solubility of various refractory materials Al2O3 MgO Cr2O3 ZrO and CaO in iron silicon slag at 1500°C The amount of liquid phase formed at 1600°C by mixing magnesia aluminum spinel MA magnesia chromium spinel MK and their composite spinel and iron silicon slag with different compositions
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Alumina magnesia and alumina spinel castables have been widely used in steel ladle linings below the slag zone the well block of purging plugs and injection lances due to their excellent slag resistance and mechanical properties 1 2 In view of the increasing ratio of scrap to steel higher working temperature and prolonged refining time the enhanced properties of materials especially for the slag resistance
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Alumina magnesia carbon brick is made of high alumina bauxite clinker It is a kind of unfired shaped refractory products with main raw materials of alumina or corundum magnesia or magnesia alumina spinel SP and graphite combined with asphalt or resin Alumina magnesia carbon refractory
Get PriceThe Application of Refractory Materials
Alkaline refractory materials with high temperature calcination and resistance to chemical erosion of the strong characteristics of the cement kiln is to achieve high quality high yield low consumption and long term safe operation of the key kiln lining materials But it also has the susceptibility to moisture thermal expansion thermal conductivity and thermal shock resistance of the main
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Why Are The Prices Of Refractory Castables So Different
The refractory castables can withstand the load of the kiln and the stress of the utility in the operation process and do not lose the structural intensity softening and collapse at high temperature When refractory castables are used at high temperature the volume will change because of the physical and chemical lining inside the castables
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A magnesium aluminate spinel bonded refractory can be formed which does not exhibit undue expansion due to the reaction of magnesia and alumina to form magnesium aluminate spinel between the raw compacted state and the fired ceramically bonded state when fired to a temperature of 1400° C if a very finely divided alumina with dense particles is used
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Porogenesis in the Alumina Brucite Magnesia Spinel System
Abstract Magnesium monoaluminate spinel MgAl2O4 is an important raw material for the refractory industry and its in situ formation from Al2O3 and MgO sources is an expansive process due to its low density Such an expansion can be a serious drawback for the production of dense structural bricks and castables since it frequently causes deformations and cracks and hinders particles from
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Physical and chemical indicators and characteristics of
The wear resistant castables made from fused corundum super grade bauxite sillimanite alumina powder and silicon powder as raw materials are featured with convenient construction good wear resistance good spalling resistance and high strength at early and mid high temperature period which overcome the disadvantages of traditional castables
Get PricePapersrefractories worldforum
Keywords corrosion mechanism CMA calcium aluminate microstructure refractory castables alumina spinel alumina magnesia spinel CA6 Abstract References Full Article New Perspectives for Investigating the Softening Behaviour of Refractory Products at High Temperature Erwan Brochen Christian Dannert Pascal Pilate Volume 7 Issue 4
Get PriceCharacteristics of magnesia aluminum spinel brick
Characteristics of magnesia aluminum spinel brickTechnical SupportZibo Jucos Co Ltd Magnesia aluminum spinel bricks are based on magnesia alumina spinels and are superior to magnesium bricks in thermal shock resistance They are widely used in the
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The use and classification of aluminum magnesium spinel
Magnesium aluminum spinel has good corrosion resistance strong corrosion and spalling ability good slag resistance abrasion resistance thermal shock stability high temperature resistance and other performance characteristics Magnesium aluminum spinel i s main uses First it replaces magnesia chrome sand making magnesia alumina stone
Get PriceMagnesium Aluminate Spinel Raw Materials for High
The MgO traces in MR 66 preclude the option of using magnesia rich spinel as a component of aqueous systems such as castables as hydration of the periclase may lead to brucite Mg OH 2 and the consequent volume change leads to cracking in cast MR66 AR78 AR90 Figure 1Alumina Magnesia Phase Diagram 3 and typical spinel properties Almatis
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Materials Free Full Text In Situ Spinel Formation in a
The hydration of an equimolar mixture of MgO and Al2O3 nano powders has been proven to be an effective way to synthesize Mg6Al2CO3 OH 16∙4H2O as a component of a nano structured matrix and magnesia alumina spinel precursor for high performance cement free corundum spinel refractory castables Mg3 –OH–brucite sites 417 °C formed initially within the magnesia ndashalumina
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Characteristics of magnesia aluminum spinel brick
Characteristics of magnesia aluminum spinel brick Apr 13 2020 Magnesia aluminum spinel bricks are based on magnesia alumina spinels and are superior to magnesium bricks in thermal shock resistance They are widely used in the construction of the
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Application Characteristics Of Low Cement Refractory
Application Characteristics Of Low Cement Refractory Castables In Cement Kiln Kiln Nov 17 2018 The cement kiln has high working temperature large heat load easy change of raw material composition and harmful gas in the evaporation place so the selection of refractory materials is relatively strict
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Aluminum magnesium Castable Zhengzhou Caihua Kiln
1 ordinary aluminum magnesium castable is composed of super or first grade high alumina aggregate and powder Al2O3 ≥ 85 and sintered magnesia powder MgO ≥ 92 Early 1980s common aluminum magnesite castable was made of water glass solution as binder for ladle lining with good slag resistance and suitable for die cast steel lining
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